3 * Macros, types, and functions to handle 802.11 mgmt frames
5 * Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
6 * --------------------------------------------------------------------
10 * The contents of this file are subject to the Mozilla Public
11 * License Version 1.1 (the "License"); you may not use this file
12 * except in compliance with the License. You may obtain a copy of
13 * the License at http://www.mozilla.org/MPL/
15 * Software distributed under the License is distributed on an "AS
16 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
17 * implied. See the License for the specific language governing
18 * rights and limitations under the License.
20 * Alternatively, the contents of this file may be used under the
21 * terms of the GNU Public License version 2 (the "GPL"), in which
22 * case the provisions of the GPL are applicable instead of the
23 * above. If you wish to allow the use of your version of this file
24 * only under the terms of the GPL and not to allow others to use
25 * your version of this file under the MPL, indicate your decision
26 * by deleting the provisions above and replace them with the notice
27 * and other provisions required by the GPL. If you do not delete
28 * the provisions above, a recipient may use your version of this
29 * file under either the MPL or the GPL.
31 * --------------------------------------------------------------------
33 * Inquiries regarding the linux-wlan Open Source project can be
36 * AbsoluteValue Systems Inc.
38 * http://www.linux-wlan.com
40 * --------------------------------------------------------------------
42 * Portions of the development of this software were funded by
43 * Intersil Corporation as part of PRISM(R) chipset product development.
45 * --------------------------------------------------------------------
47 * This file declares the constants and types used in the interface
48 * between a wlan driver and the user mode utilities.
51 * - Constant values are always in HOST byte order. To assign
52 * values to multi-byte fields they _must_ be converted to
53 * ieee byte order. To retrieve multi-byte values from incoming
54 * frames, they must be converted to host order.
56 * - The len member of the frame structure does NOT!!! include
57 * the MAC CRC. Therefore, the len field on rx'd frames should
58 * have 4 subtracted from it.
60 * All functions declared here are implemented in p80211.c
62 * The types, macros, and functions defined here are primarily
63 * used for encoding and decoding management frames. They are
64 * designed to follow these patterns of use:
67 * 1) a frame of length len is received into buffer b
68 * 2) using the hdr structure and macros, we determine the type
69 * 3) an appropriate mgmt frame structure, mf, is allocated and zeroed
73 * 5) call mgmt_decode( mf )
74 * 6) the frame field pointers in mf are now set. Note that any
75 * multi-byte frame field values accessed using the frame field
76 * pointers are in ieee byte order and will have to be converted
80 * 1) Library client allocates buffer space for maximum length
81 * frame of the desired type
82 * 2) Library client allocates a mgmt frame structure, called mf,
84 * 3) Set the following:
85 * mf.type = <desired type>
86 * mf.buf = <allocated buffer address>
87 * 4) call mgmt_encode( mf )
88 * 5) all of the fixed field pointers and fixed length information element
89 * pointers in mf are now set to their respective locations in the
90 * allocated space (fortunately, all variable length information elements
91 * fall at the end of their respective frames).
92 * 5a) The length field is set to include the last of the fixed and fixed
93 * length fields. It may have to be updated for optional or variable
94 * length information elements.
95 * 6) Optional and variable length information elements are special cases
96 * and must be handled individually by the client code.
97 * --------------------------------------------------------------------
100 #ifndef _P80211MGMT_H
101 #define _P80211MGMT_H
103 /*================================================================*/
104 /* Project Includes */
106 #ifndef _WLAN_COMPAT_H
107 #include "wlan_compat.h"
111 #include "p80211hdr.h"
115 /*================================================================*/
118 /*-- Information Element IDs --------------------*/
119 #define WLAN_EID_SSID 0
120 #define WLAN_EID_SUPP_RATES 1
121 #define WLAN_EID_FH_PARMS 2
122 #define WLAN_EID_DS_PARMS 3
123 #define WLAN_EID_CF_PARMS 4
124 #define WLAN_EID_TIM 5
125 #define WLAN_EID_IBSS_PARMS 6
126 /*-- values 7-15 reserved --*/
127 #define WLAN_EID_CHALLENGE 16
128 /*-- values 17-31 reserved for challenge text extension --*/
129 /*-- values 32-255 reserved --*/
131 /*-- Reason Codes -------------------------------*/
132 #define WLAN_MGMT_REASON_RSVD 0
133 #define WLAN_MGMT_REASON_UNSPEC 1
134 #define WLAN_MGMT_REASON_PRIOR_AUTH_INVALID 2
135 #define WLAN_MGMT_REASON_DEAUTH_LEAVING 3
136 #define WLAN_MGMT_REASON_DISASSOC_INACTIVE 4
137 #define WLAN_MGMT_REASON_DISASSOC_AP_BUSY 5
138 #define WLAN_MGMT_REASON_CLASS2_NONAUTH 6
139 #define WLAN_MGMT_REASON_CLASS3_NONASSOC 7
140 #define WLAN_MGMT_REASON_DISASSOC_STA_HASLEFT 8
141 #define WLAN_MGMT_REASON_CANT_ASSOC_NONAUTH 9
143 /*-- Status Codes -------------------------------*/
144 #define WLAN_MGMT_STATUS_SUCCESS 0
145 #define WLAN_MGMT_STATUS_UNSPEC_FAILURE 1
146 #define WLAN_MGMT_STATUS_CAPS_UNSUPPORTED 10
147 #define WLAN_MGMT_STATUS_REASSOC_NO_ASSOC 11
148 #define WLAN_MGMT_STATUS_ASSOC_DENIED_UNSPEC 12
149 #define WLAN_MGMT_STATUS_UNSUPPORTED_AUTHALG 13
150 #define WLAN_MGMT_STATUS_RX_AUTH_NOSEQ 14
151 #define WLAN_MGMT_STATUS_CHALLENGE_FAIL 15
152 #define WLAN_MGMT_STATUS_AUTH_TIMEOUT 16
153 #define WLAN_MGMT_STATUS_ASSOC_DENIED_BUSY 17
154 #define WLAN_MGMT_STATUS_ASSOC_DENIED_RATES 18
155 /* p80211b additions */
156 #define WLAN_MGMT_STATUS_ASSOC_DENIED_NOSHORT 19
157 #define WLAN_MGMT_STATUS_ASSOC_DENIED_NOPBCC 20
158 #define WLAN_MGMT_STATUS_ASSOC_DENIED_NOAGILITY 21
160 /*-- Auth Algorithm Field ---------------------------*/
161 #define WLAN_AUTH_ALG_OPENSYSTEM 0
162 #define WLAN_AUTH_ALG_SHAREDKEY 1
164 /*-- Management Frame Field Offsets -------------*/
165 /* Note: Not all fields are listed because of variable lengths, */
166 /* see the code in p80211.c to see how we search for fields */
167 /* Note: These offsets are from the start of the frame data */
169 #define WLAN_BEACON_OFF_TS 0
170 #define WLAN_BEACON_OFF_BCN_int 8
171 #define WLAN_BEACON_OFF_CAPINFO 10
172 #define WLAN_BEACON_OFF_SSID 12
174 #define WLAN_DISASSOC_OFF_REASON 0
176 #define WLAN_ASSOCREQ_OFF_CAP_INFO 0
177 #define WLAN_ASSOCREQ_OFF_LISTEN_int 2
178 #define WLAN_ASSOCREQ_OFF_SSID 4
180 #define WLAN_ASSOCRESP_OFF_CAP_INFO 0
181 #define WLAN_ASSOCRESP_OFF_STATUS 2
182 #define WLAN_ASSOCRESP_OFF_AID 4
183 #define WLAN_ASSOCRESP_OFF_SUPP_RATES 6
185 #define WLAN_REASSOCREQ_OFF_CAP_INFO 0
186 #define WLAN_REASSOCREQ_OFF_LISTEN_int 2
187 #define WLAN_REASSOCREQ_OFF_CURR_AP 4
188 #define WLAN_REASSOCREQ_OFF_SSID 10
190 #define WLAN_REASSOCRESP_OFF_CAP_INFO 0
191 #define WLAN_REASSOCRESP_OFF_STATUS 2
192 #define WLAN_REASSOCRESP_OFF_AID 4
193 #define WLAN_REASSOCRESP_OFF_SUPP_RATES 6
195 #define WLAN_PROBEREQ_OFF_SSID 0
197 #define WLAN_PROBERESP_OFF_TS 0
198 #define WLAN_PROBERESP_OFF_BCN_int 8
199 #define WLAN_PROBERESP_OFF_CAP_INFO 10
200 #define WLAN_PROBERESP_OFF_SSID 12
202 #define WLAN_AUTHEN_OFF_AUTH_ALG 0
203 #define WLAN_AUTHEN_OFF_AUTH_SEQ 2
204 #define WLAN_AUTHEN_OFF_STATUS 4
205 #define WLAN_AUTHEN_OFF_CHALLENGE 6
207 #define WLAN_DEAUTHEN_OFF_REASON 0
209 /*-- Capability Field ---------------------------*/
210 #define WLAN_GET_MGMT_CAP_INFO_ESS(n) ((n) & BIT(0))
211 #define WLAN_GET_MGMT_CAP_INFO_IBSS(n) (((n) & BIT(1)) >> 1)
212 #define WLAN_GET_MGMT_CAP_INFO_CFPOLLABLE(n) (((n) & BIT(2)) >> 2)
213 #define WLAN_GET_MGMT_CAP_INFO_CFPOLLREQ(n) (((n) & BIT(3)) >> 3)
214 #define WLAN_GET_MGMT_CAP_INFO_PRIVACY(n) (((n) & BIT(4)) >> 4)
215 /* p80211b additions */
216 #define WLAN_GET_MGMT_CAP_INFO_SHORT(n) (((n) & BIT(5)) >> 5)
217 #define WLAN_GET_MGMT_CAP_INFO_PBCC(n) (((n) & BIT(6)) >> 6)
218 #define WLAN_GET_MGMT_CAP_INFO_AGILITY(n) (((n) & BIT(7)) >> 7)
220 #define WLAN_SET_MGMT_CAP_INFO_ESS(n) (n)
221 #define WLAN_SET_MGMT_CAP_INFO_IBSS(n) ((n) << 1)
222 #define WLAN_SET_MGMT_CAP_INFO_CFPOLLABLE(n) ((n) << 2)
223 #define WLAN_SET_MGMT_CAP_INFO_CFPOLLREQ(n) ((n) << 3)
224 #define WLAN_SET_MGMT_CAP_INFO_PRIVACY(n) ((n) << 4)
225 /* p80211b additions */
226 #define WLAN_SET_MGMT_CAP_INFO_SHORT(n) ((n) << 5)
227 #define WLAN_SET_MGMT_CAP_INFO_PBCC(n) ((n) << 6)
228 #define WLAN_SET_MGMT_CAP_INFO_AGILITY(n) ((n) << 7)
230 /*-- Information Element Types --------------------*/
231 /* prototype structure, all IEs start with these members */
233 typedef struct wlan_ie {
236 } __attribute__ ((packed)) wlan_ie_t;
238 /*-- Service Set Identity (SSID) -----------------*/
239 typedef struct wlan_ie_ssid {
242 u8 ssid[1]; /* may be zero, ptrs may overlap */
243 } __attribute__ ((packed)) wlan_ie_ssid_t;
245 /*-- Supported Rates -----------------------------*/
246 typedef struct wlan_ie_supp_rates {
249 u8 rates[1]; /* had better be at LEAST one! */
250 } __attribute__ ((packed)) wlan_ie_supp_rates_t;
252 /*-- FH Parameter Set ----------------------------*/
253 typedef struct wlan_ie_fh_parms {
260 } __attribute__ ((packed)) wlan_ie_fh_parms_t;
262 /*-- DS Parameter Set ----------------------------*/
263 typedef struct wlan_ie_ds_parms {
267 } __attribute__ ((packed)) wlan_ie_ds_parms_t;
269 /*-- CF Parameter Set ----------------------------*/
271 typedef struct wlan_ie_cf_parms {
277 u16 cfp_durremaining;
278 } __attribute__ ((packed)) wlan_ie_cf_parms_t;
280 /*-- TIM ------------------------------------------*/
281 typedef struct wlan_ie_tim {
288 } __attribute__ ((packed)) wlan_ie_tim_t;
290 /*-- IBSS Parameter Set ---------------------------*/
291 typedef struct wlan_ie_ibss_parms {
295 } __attribute__ ((packed)) wlan_ie_ibss_parms_t;
297 /*-- Challenge Text ------------------------------*/
298 typedef struct wlan_ie_challenge {
302 } __attribute__ ((packed)) wlan_ie_challenge_t;
304 /*-------------------------------------------------*/
307 /* prototype structure, all mgmt frame types will start with these members */
308 typedef struct wlan_fr_mgmt {
310 u16 len; /* DOES NOT include CRC !!!! */
313 /* used for target specific data, skb in Linux */
315 /*-- fixed fields -----------*/
316 /*-- info elements ----------*/
319 /*-- Beacon ---------------------------------------*/
320 typedef struct wlan_fr_beacon {
325 /* used for target specific data, skb in Linux */
327 /*-- fixed fields -----------*/
331 /*-- info elements ----------*/
332 wlan_ie_ssid_t *ssid;
333 wlan_ie_supp_rates_t *supp_rates;
334 wlan_ie_fh_parms_t *fh_parms;
335 wlan_ie_ds_parms_t *ds_parms;
336 wlan_ie_cf_parms_t *cf_parms;
337 wlan_ie_ibss_parms_t *ibss_parms;
342 /*-- IBSS ATIM ------------------------------------*/
343 typedef struct wlan_fr_ibssatim {
348 /* used for target specific data, skb in Linux */
351 /*-- fixed fields -----------*/
352 /*-- info elements ----------*/
354 /* this frame type has a null body */
356 } wlan_fr_ibssatim_t;
358 /*-- Disassociation -------------------------------*/
359 typedef struct wlan_fr_disassoc {
364 /* used for target specific data, skb in Linux */
366 /*-- fixed fields -----------*/
369 /*-- info elements ----------*/
371 } wlan_fr_disassoc_t;
373 /*-- Association Request --------------------------*/
374 typedef struct wlan_fr_assocreq {
379 /* used for target specific data, skb in Linux */
381 /*-- fixed fields -----------*/
384 /*-- info elements ----------*/
385 wlan_ie_ssid_t *ssid;
386 wlan_ie_supp_rates_t *supp_rates;
388 } wlan_fr_assocreq_t;
390 /*-- Association Response -------------------------*/
391 typedef struct wlan_fr_assocresp {
396 /* used for target specific data, skb in Linux */
398 /*-- fixed fields -----------*/
402 /*-- info elements ----------*/
403 wlan_ie_supp_rates_t *supp_rates;
405 } wlan_fr_assocresp_t;
407 /*-- Reassociation Request ------------------------*/
408 typedef struct wlan_fr_reassocreq {
413 /* used for target specific data, skb in Linux */
415 /*-- fixed fields -----------*/
419 /*-- info elements ----------*/
420 wlan_ie_ssid_t *ssid;
421 wlan_ie_supp_rates_t *supp_rates;
423 } wlan_fr_reassocreq_t;
425 /*-- Reassociation Response -----------------------*/
426 typedef struct wlan_fr_reassocresp {
431 /* used for target specific data, skb in Linux */
433 /*-- fixed fields -----------*/
437 /*-- info elements ----------*/
438 wlan_ie_supp_rates_t *supp_rates;
440 } wlan_fr_reassocresp_t;
442 /*-- Probe Request --------------------------------*/
443 typedef struct wlan_fr_probereq {
448 /* used for target specific data, skb in Linux */
450 /*-- fixed fields -----------*/
451 /*-- info elements ----------*/
452 wlan_ie_ssid_t *ssid;
453 wlan_ie_supp_rates_t *supp_rates;
455 } wlan_fr_probereq_t;
457 /*-- Probe Response -------------------------------*/
458 typedef struct wlan_fr_proberesp {
463 /* used for target specific data, skb in Linux */
465 /*-- fixed fields -----------*/
469 /*-- info elements ----------*/
470 wlan_ie_ssid_t *ssid;
471 wlan_ie_supp_rates_t *supp_rates;
472 wlan_ie_fh_parms_t *fh_parms;
473 wlan_ie_ds_parms_t *ds_parms;
474 wlan_ie_cf_parms_t *cf_parms;
475 wlan_ie_ibss_parms_t *ibss_parms;
476 } wlan_fr_proberesp_t;
478 /*-- Authentication -------------------------------*/
479 typedef struct wlan_fr_authen {
484 /* used for target specific data, skb in Linux */
486 /*-- fixed fields -----------*/
490 /*-- info elements ----------*/
491 wlan_ie_challenge_t *challenge;
495 /*-- Deauthenication -----------------------------*/
496 typedef struct wlan_fr_deauthen {
501 /* used for target specific data, skb in Linux */
503 /*-- fixed fields -----------*/
506 /*-- info elements ----------*/
508 } wlan_fr_deauthen_t;
510 void wlan_mgmt_encode_beacon(wlan_fr_beacon_t *f);
511 void wlan_mgmt_decode_beacon(wlan_fr_beacon_t *f);
512 void wlan_mgmt_encode_disassoc(wlan_fr_disassoc_t *f);
513 void wlan_mgmt_decode_disassoc(wlan_fr_disassoc_t *f);
514 void wlan_mgmt_encode_assocreq(wlan_fr_assocreq_t *f);
515 void wlan_mgmt_decode_assocreq(wlan_fr_assocreq_t *f);
516 void wlan_mgmt_encode_assocresp(wlan_fr_assocresp_t *f);
517 void wlan_mgmt_decode_assocresp(wlan_fr_assocresp_t *f);
518 void wlan_mgmt_encode_reassocreq(wlan_fr_reassocreq_t *f);
519 void wlan_mgmt_decode_reassocreq(wlan_fr_reassocreq_t *f);
520 void wlan_mgmt_encode_reassocresp(wlan_fr_reassocresp_t *f);
521 void wlan_mgmt_decode_reassocresp(wlan_fr_reassocresp_t *f);
522 void wlan_mgmt_encode_probereq(wlan_fr_probereq_t *f);
523 void wlan_mgmt_decode_probereq(wlan_fr_probereq_t *f);
524 void wlan_mgmt_encode_proberesp(wlan_fr_proberesp_t *f);
525 void wlan_mgmt_decode_proberesp(wlan_fr_proberesp_t *f);
526 void wlan_mgmt_encode_authen(wlan_fr_authen_t *f);
527 void wlan_mgmt_decode_authen(wlan_fr_authen_t *f);
528 void wlan_mgmt_encode_deauthen(wlan_fr_deauthen_t *f);
529 void wlan_mgmt_decode_deauthen(wlan_fr_deauthen_t *f);
531 #endif /* _P80211MGMT_H */